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# Copyright: Ankitects Pty Ltd and contributors
# -*- coding: utf-8 -*-
# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
import time
from aqt.qt import *
import aqt.forms
from anki.lang import _
# fixme: if mw->subwindow opens a progress dialog with mw as the parent, mw
# gets raised on finish on compiz. perhaps we should be using the progress
# dialog as the parent?
# Progress info
##########################################################################
class ProgressManager:
def __init__(self, mw):
self.mw = mw
self.app = QApplication.instance()
self.inDB = False
self.blockUpdates = False
self._win = None
self._levels = 0
# SQLite progress handler
##########################################################################
def setupDB(self, db):
"Install a handler in the current DB."
self.lastDbProgress = 0
self.inDB = False
db.set_progress_handler(self._dbProgress, 10000)
def _dbProgress(self):
"Called from SQLite."
# do nothing if we don't have a progress window
if not self._win:
return
# make sure we're not executing too frequently
if (time.time() - self.lastDbProgress) < 0.01:
return
self.lastDbProgress = time.time()
# and we're in the main thread
if not self.mw.inMainThread():
return
# ensure timers don't fire
self.inDB = True
# handle GUI events
if not self.blockUpdates:
self._maybeShow()
self.app.processEvents(QEventLoop.ExcludeUserInputEvents)
self.inDB = False
# Safer timers
##########################################################################
# QTimer may fire in processEvents(). We provide a custom timer which
# automatically defers until the DB is not busy, and avoids running
# while a progress window is visible.
def timer(self, ms, func, repeat, requiresCollection=True):
def handler():
if self.inDB or self._levels:
# retry in 100ms
self.timer(100, func, False, requiresCollection)
elif not self.mw.col and requiresCollection:
# ignore timer events that fire after collection has been
# unloaded
print("Ignored progress func as collection unloaded: %s" % repr(func))
else:
func()
t = QTimer(self.mw)
if not repeat:
t.setSingleShot(True)
t.timeout.connect(handler)
t.start(ms)
return t
# Creating progress dialogs
##########################################################################
class ProgressDialog(QDialog):
def __init__(self, parent):
QDialog.__init__(self, parent)
self.form = aqt.forms.progress.Ui_Dialog()
self.form.setupUi(self)
self._closingDown = False
self.wantCancel = False
def cancel(self):
self._closingDown = True
self.hide()
def closeEvent(self, evt):
if self._closingDown:
evt.accept()
else:
self.wantCancel = True
evt.ignore()
def keyPressEvent(self, evt):
if evt.key() == Qt.Key_Escape:
evt.ignore()
self.wantCancel = True
def start(self, max=0, min=0, label=None, parent=None, immediate=False):
self._levels += 1
if self._levels > 1:
return
# setup window
parent = parent or self.app.activeWindow()
if not parent and self.mw.isVisible():
parent = self.mw
label = label or _("Processing...")
self._win = self.ProgressDialog(parent)
self._win.form.progressBar.setMinimum(min)
self._win.form.progressBar.setMaximum(max)
self._win.form.progressBar.setTextVisible(False)
self._win.form.label.setText(label)
self._win.setWindowTitle("Anki")
self._win.setWindowModality(Qt.ApplicationModal)
self._win.setMinimumWidth(300)
if immediate:
self._showWin()
else:
self._shown = False
self._counter = min
self._min = min
self._max = max
self._firstTime = time.time()
self._lastUpdate = time.time()
self._updating = False
return self._win
def update(self, label=None, value=None, process=True, maybeShow=True):
#print self._min, self._counter, self._max, label, time.time() - self._lastTime
if self._updating:
return
if maybeShow:
self._maybeShow()
if not self._shown:
return
elapsed = time.time() - self._lastUpdate
if label:
self._win.form.label.setText(label)
if self._max:
self._counter = value or (self._counter+1)
self._win.form.progressBar.setValue(self._counter)
if process and elapsed >= 0.2:
self._updating = True
self.app.processEvents(QEventLoop.ExcludeUserInputEvents)
self._updating = False
self._lastUpdate = time.time()
def finish(self):
self._levels -= 1
self._levels = max(0, self._levels)
if self._levels == 0 and self._win:
self._closeWin()
def clear(self):
"Restore the interface after an error."
if self._levels:
self._levels = 1
self.finish()
def _maybeShow(self):
if not self._levels:
return
if self._shown:
self.update(maybeShow=False)
return
delta = time.time() - self._firstTime
if delta > 0.5:
self._showWin()
def _showWin(self):
self._shown = time.time()
self._win.show()
self._setBusy()
def _closeWin(self):
if self._shown:
while True:
# give the window system a second to present
# window before we close it again - fixes
# progress window getting stuck, especially
# on ubuntu 16.10+
elap = time.time() - self._shown
if elap >= 0.5:
break
self.app.processEvents(QEventLoop.ExcludeUserInputEvents)
self._win.cancel()
self._win = None
self._shown = False
self._unsetBusy()
def _setBusy(self):
self.mw.app.setOverrideCursor(QCursor(Qt.WaitCursor))
def _unsetBusy(self):
self.app.restoreOverrideCursor()
def busy(self):
"True if processing."
return self._levels
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